您可以使用linq查看兩個IEnumerable數據是否包含任何常用條目？

Question

IEnumerable<fishbiscuits> a = GetFishBiscuits(0); 
IEnumerable<fishbiscuits> b = GetFishBiscuits(1); 

if ([any of the results in either list match]) 
{ 
// Do something ie 
Console.WriteLine("I see both a and b love at least one of the same type of fish biscuit!"); 
} 

您可以使用linq查看兩個IEnumerable數據是否包含任何常用條目？

Answer 1

是的，你可以使用Intersect和Any做到這一點：

bool anyCommonEntries = a.Intersect(b).Any(); 

Answer 2

public void Linq50() 
{ 
    int[] numbersA = { 0, 2, 4, 5, 6, 8, 9 }; 
    int[] numbersB = { 1, 3, 5, 7, 8 }; 

    var commonNumbers = numbersA.Intersect(numbersB); 

    Console.WriteLine("Common numbers shared by both arrays:"); 
    foreach (var n in commonNumbers) 
    { 
     Console.WriteLine(n); 
    } 
} 

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從101個LINQ的樣品 - Intersect

Msdn documentation的相交

Extension Methods Roundup: Intersect, Union, AsNullable and GroupEvery